High Energy, Nuclear, Particle Physics

- Properties, relationships, and interactions of subatomic particles. Exp. & theo. physics of nuclei & elementary particles
 Meta Thread / Thread Starter Last Post Replies Views Views: 122,344 Announcement: Follow us on social media and spread the word about PF! Jan16-12 Pinned: Higgs particle is 'found' ( 1 2 3 ... Last) God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered... Jul18-14 12:32 PM ChrisVer 187 58,749 Pinned: Forum Rules Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a... Feb23-13 08:41 AM ZapperZ 1 25,172 Hi. I am currently studying about representations of Lie algebras. I have two questions: 1. As I understand, when... Jul12-14 11:00 PM spookyfish 11 2,581 Hello, I have a gamma spectrum of one element (X). There are several gamma peak in the spectrum. For example, 800... Jul10-14 03:19 PM mfb 14 3,247 I'm stucked in a passage of Particle Physics (Martin B., Shaw G.) in page 41 regarding neutrino oscillations. ... Jul10-14 03:15 PM George Jones 6 2,265 How can someone think of the neutrinos as non relativistic? OK I understand for example that the neutrino temperature... Jul9-14 04:55 PM Orodruin 13 3,004 Wikipedia says CERN has isolated about 38 atoms of antihydrogen and maintained them for over 15 minutes? ... Do you... Jul9-14 03:59 PM SteamKing 5 2,425 Annihilation results in an extreme burst of energy..... If enough antimatter is isolated, it can be utilized for... Jul9-14 02:49 AM Syed Ammar 5 2,130 Hi I am trying to find the equations of a charged particle inside a dipole & quadripole. Practically, I need to... Jul8-14 09:34 PM Vanadium 50 6 1,948 "The question is very simple: do matter and antimatter obey the same laws of physics?.?? Jul8-14 02:28 PM ChrisVer 4 2,051 I'm starting to learn about particle physics but I really want to see the whole picture before going deep. Here is... Jul5-14 09:46 PM Trifis 2 2,112 Hi! I try to construct the emission spectrum from relativistic electron rotating in homogeneous magnetic field -... Jul5-14 10:06 AM mfb 3 1,849 If uranium 238 is more stable than uranium 235 because 3 extra neutrons add to strong force then uranium 236 having 1... Jul5-14 08:11 AM mfb 5 3,245 I know that the nucleus can be considered a bunch of particles that constantly transition between protons and neutrons... Jul4-14 05:31 PM gildomar 3 2,254 Suppose we have a superfield \Phi(x,\theta,\bar{\theta}) this can be expanded in component fields in the standard way... Jul3-14 01:17 PM ChrisVer 2 2,390 Hi, is there a way to compute the escape velocity/kinetic energy of a newly created electron/positron pair ? Or in... Jul2-14 05:10 PM mfb 39 10,551 Hi I am re-reading Srednicki's QFT. In chapter 58, he points out that the Noether current ... Jun30-14 10:21 PM cedricyu803 2 2,755 Hi Board, In the Spectrum of Co60 ... Jun29-14 08:55 PM echaniot 7 3,045 I have a problem with the calculus of magnetic moment of Li-6. The configuration of protons is 1p_{3/2}, and the... Jun29-14 03:17 PM PeterDonis 4 2,701 I have read that for a system of 2 particles, the total parity is given by: P=P_1 P_2 (-1)^L where - P_1, P_2=... Jun28-14 09:50 AM bznm 8 2,205 To find a new particle, the energy and momentum of the (decayed) particles are measured Evaluate the expression m^2... Jun28-14 12:56 AM Simon Bridge 5 2,369 Pauli's Principle says: "The wavefunction of two identical fermions must be totally antisymmetric". I know... Jun28-14 12:43 AM Simon Bridge 1 2,275 I know that a particle's exact anti-counterpart (i.e. an electron and positron) will annihilate into pure energy. But... Jun26-14 06:12 PM mfb 8 2,530 S=\int d^4x\frac{m}{12}A_μ ε^{μ \nu ρσ} H_{\nu ρσ} + \frac{1}{8} m^2A^μA_μ Where H_{\nu ρσ} = \partial_\nu B_{ρσ}... Jun26-14 03:31 AM bagherihan 6 2,152 I am sorry, this is a rather dump question- more like a notation question since the sources I've looked into don't... Jun25-14 12:41 PM ChrisVer 4 611 I have heard that perturbative quantum gravity calculation predicts an increase of constant G at large distances. ... Jun24-14 06:10 PM ChrisVer 2 638 When I opened up the "High Energy,Nuclear,Particle Physics" section, it was kind of like "Holy \$#^*!!!- I don't know... Jun24-14 12:44 PM mfb 4 661 Because I am a little tired to think... For where does the mass difference between the W and Z bosons come from? Jun24-14 12:22 PM ChrisVer 6 661 why the topological term in gauge theory, ε_{\mu\nu ρσ}F^{\mu \nu} F^{ρσ} ,is scale-independent? Jun24-14 06:20 AM samalkhaiat 7 780 I have a question: With the detection of the Higgs Boson particle, if one were to remove all said particles from a... Jun23-14 08:43 PM ChrisVer 10 1,118 In the standard model gravitron is a particle but Higgs boson is not. The Higgs field causes particles to acquire... Jun21-14 07:51 PM mfb 18 1,297 Is there anywhere I can see the explicit derivation for a massless real scalar and for the EM field? thank you. Jun21-14 12:16 PM samalkhaiat 4 931 In case you have the Kahler and super- potential K,W: K(T,S,C) = -log (S +S^{*}) -3 log ( T+ T^{*} - C C^{*}) ... Jun19-14 07:05 PM ChrisVer 1 487 MIT bag model is a famous model, which can be used for calculating quark distribution function in hadrons. ... Jun19-14 07:30 AM Chenkb 0 519 Specifically in Carl D Anderson's cloud chamber experiment, the first experiment to prove the existence of the... Jun18-14 06:45 PM kurros 5 598 dear sir, i heard that that proton spins about itselfand this helps in stability of nucleus. i also heard... Jun17-14 02:31 AM shivakumar06 11 813 This article on Majorana particles: http://news.yahoo.com/hunt-source-matter-continues-130052152.html If neutrinos... Jun16-14 09:45 PM Matterwave 15 1,134 Dear PF, although I've gone through many particle phyics lectures and text books, I still have problems with wrap... Jun15-14 05:56 PM kurros 7 722 Ok so I recently read this article... Jun15-14 06:01 AM maajdl 1 611 Hi, While studying Lie groups and in particular the representations I have some trouble with determining whether a... Jun14-14 12:37 PM JorisL 2 628 Such as ##\Sigma^0 \to \bar{\Lambda}\gamma\gamma##. I want to make a complete collection of all these decay modes,... Jun14-14 11:42 AM mfb 10 665 I have read that the Z boson cannot change the flavour of a particle. So my assumption is that an interaction such as:... Jun13-14 09:31 AM Orodruin 13 857